Re: [cc65] Apple II No-Slot-Clock

> 
> Hi Ben,
> 
> > I have a no-slot-clock on the way for my Apple II and was wondering if
> > anyone has some sample code or pointers on how to use it from cc65. It
> > apparently emulates the Thunderclock.
> 
> According to the Tunderclock users guide
> (http://www.apple-iigs.info/doc/fichiers/thunderclock.pdf)
> you access the clock on three levels:
> 
> - BASIC: Doesn't work (at least well) from cc65 programs.
> 
> - Firmware: See the code below that I hacked up for you based on the first
> sample in chapter 4 of the users guide.
> 
> - Hardware: Necessary for interrupt based access. cc65 has quite nice
> interrupt support for the Apple2 under ProDOS 8. You need to do some
> assembler coding to use it. Check out the cc65 source on how to do it
> and/or ask me if you've got problems.
> 
> Best, Oliver
> 
> #include "stdio.h"
> 
> void (*rdtcp)(void) = (void (*)(void))0xC208;
> void __fastcall__ (*wttcp)(char) = (void __fastcall__(*)(char))0xC20B;
> 
> void main(void)
> {
>   char *c = (char*)0x200;
> 
>   wttcp('>' | 0x80);
>   rdtcp();
> 
>   putchar('\n');
>     while (*c)
>   putchar(*++c & 0x7F);
>   putchar('\n');
> }

I have the sources for that in C on the PC. 
I also have the same device in one of my XT machines. 
If I can get the chance to find the floppy with the source code on it, or 
find it in one of my archives, I can place a PC disk image up on my 
web server for you along with the extracted files in a zip.

Might be something interesting to add onto my emulator too, which I 
have not touched in some 12 years.

Yours,
-- 
Andrew J. Kroll
Software and Hardware Engineer and Consultant
Grafixoft http://dr.ea.ms/HW/
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